0.85V到5V的输入电压CXSU63034高效的固定频率同步DC/DC转换器自动PFM模式电磁干扰抑制反环控制电路

目录r90嘉泰姆

1.产品概述       2.产品特点     3.应用范围      4.技术规格书下载（产品PDF文档） r90嘉泰姆
5.产品封装图   6.电路原理图  7.功能概述      8.相关产品r90嘉泰姆

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一,产品概述(General Description)      r90嘉泰姆
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     The CXSU63034 is a highly efficient fix frequencysynchronous step-upr90嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. Powerr90嘉泰姆
dissipation during operation is only 40μA typical and drops to less thanr90嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034r90嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltager90嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency atr90嘉泰姆
light loads, further extend battery life. Switching frequency is internally set at 1.2MHz, design for use of small value surface mount inductor, input andr90嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.r90嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effectr90嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.r90嘉泰姆
二.产品特点(Features)r90嘉泰姆
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Input Voltage Operating Range: 0.85V to 5Vr90嘉泰姆
Voltage Output Range: 2.5V to 5.5Vr90嘉泰姆
Efficiency Up to 94%r90嘉泰姆
3.3V/100mA Output at 1.0V Inputr90嘉泰姆
5V/700mA Output at 3.6V Inputr90嘉泰姆
Low Start-up Voltage: 0.85V Typicalr90嘉泰姆
1.2MHz Constant Frequency Operationr90嘉泰姆
Internal Synchronous Rectifierr90嘉泰姆
EMI Reduction Anti-Ring Control Circuitryr90嘉泰姆
Low Shutdown Current: < 1.0uAr90嘉泰姆
Over Current Protectionr90嘉泰姆
Over Temperature Protectionr90嘉泰姆
Light Load PFM Mode Operationr90嘉泰姆
SOT23-6 Packager90嘉泰姆
三,应用范围 (Applications)r90嘉泰姆
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 Li-ion Battery Chargerr90嘉泰姆

 TYPICAL APPLICATIONS
USB Audior90嘉泰姆
Wireless Mouser90嘉泰姆
Digital Still Camerasr90嘉泰姆
MP3/MP4 Playersr90嘉泰姆
Portable Instrumentsr90嘉泰姆
四.技术规格书下载（产品PDF）r90嘉泰姆

需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！r90嘉泰姆

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五,产品封装图 (Package)r90嘉泰姆
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六.电路原理图r90嘉泰姆
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七,功能概述r90嘉泰姆
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1)General Descriptionr90嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.r90嘉泰姆
It utilizes internal MOSFET switches to achieve highr90嘉泰姆
efficiency over full load current range. It operates at ar90嘉泰姆
fixed switching frequency of 1.2MHz, and uses ther90嘉泰姆
slope compensated peak current mode pulse widthr90嘉泰姆
modulation (PWM) architecture. The device canr90嘉泰姆
operate with an input voltage below 1V and ther90嘉泰姆
minimum start-up voltage is 0.85V.r90嘉泰姆
2) Current Mode Operation r90嘉泰姆
The CXSU63034 is based on a slope compensated peakr90嘉泰姆
current mode PWM control topology. It operates at ar90嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachr90嘉泰姆
clock cycle, the main switch (NMOS) is turned on andr90嘉泰姆
the inductor current starts to ramp. After the maximumr90嘉泰姆
duty cycle or the sense current signal equals the errorr90嘉泰姆
amplifier output, the main switch is turned off and ther90嘉泰姆
synchronous switch (PMOS) is turned on. This controlr90嘉泰姆
topology features cycle-by-cycle current limiting whichr90嘉泰姆
can prevent the main switch from overstress and ther90嘉泰姆
external inductor from saturating.r90嘉泰姆
3) Synchronous Rectification r90嘉泰姆
The CXSU63034 integrates a synchronous rectifier tor90嘉泰姆
improve efficiency as well as to eliminate the need forr90嘉泰姆
an external Schottky diode. The synchronous rectifier isr90嘉泰姆
used to reduce the loss condition contributed by ther90嘉泰姆
forward voltage of an external Schottky diode. Ther90嘉泰姆
synchronous rectifier is realized by a P-channel MOSr90嘉泰姆
(PMOS) with gate control circuitry that incorporatesr90嘉泰姆
八,相关芯片选择指南           更多同类产品........    r90嘉泰姆